CN102815939A - Leadless piezoelectric textured ceramic material and preparation method thereof - Google Patents
Leadless piezoelectric textured ceramic material and preparation method thereof Download PDFInfo
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- CN102815939A CN102815939A CN2012102462720A CN201210246272A CN102815939A CN 102815939 A CN102815939 A CN 102815939A CN 2012102462720 A CN2012102462720 A CN 2012102462720A CN 201210246272 A CN201210246272 A CN 201210246272A CN 102815939 A CN102815939 A CN 102815939A
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Abstract
The invention relates to a leadless piezoelectric textured ceramic material and a preparation method thereof, belonging to the field of leadless piezoelectric materials. Chemical components in the leadless piezoelectric ceramic material provided by the invention fit in the following general chemical formula: (1-x)(Bi0.5Na0.5)TiO3-xSrTiO3, wherein x is no less than 0.2 and no more than 0.35. The preparation method comprises the following steps: 1) preparing a corresponding base material and a corresponding template; 2) placing the template and the base material in a certain ratio in a ball milling pot, adding a solvent and carrying out grinding with a roller so as to obtain slurry; 3) carrying out tape casting on the slurry so as to obtain a membrane; 4) cutting the membrane, laminating the cut membrane and carrying out hot press molding; and 5) taking out a pressed sample for heat treatment so as to obtain the leadless piezoelectric textured ceramic material with good orientation. The leadless piezoelectric textured ceramic material prepared by using the method has high orientation and can be widely used in aspects like piezoelectric transducers, piezoelectric motors, high precision displacement controllers, etc.
Description
Technical field
The invention belongs to the leadless piezoelectric material material field, relate in particular to a kind of leadless piezoelectric (1-x) (Bi
0.5Na
0.5) TiO
3-xSrTiO
3Texture ceramic material and the textured method of this leadless piezoelectric structured stupalith.
Background technology
Piezoelectric is widely used in present Electronics Science and Technology, comprises the gordian technique in the spationautics, medical science and industrial stopper, transverter, transmitter etc.Widespread use at present be the basic piezoelectric of Pb-based lanthanumdoped zirconate titanates (PZT) of the perovskite typed of lead base; As everyone knows; Preparation, use and discarded last handling process in the lead base material can cause serious harm to the mankind and environment, therefore research and develop environmentally friendly leadless piezoelectric material material and be one urgent and the task of important realistic meaning arranged.
The leadless piezoelectric system of report mainly contains four kinds at present: BaTiO
3Base leadless piezoelectricity material, (Bi
0.5Na
0.5) TiO
3Base leadless piezoelectricity material, niobate lead-free piezoelectric and bismuth laminated leadless piezoelectric.Wherein bismuth-sodium titanate is because its superior ferroelectricity and piezoelectricity, thereby receives various countries scholar's concern.Mainly be through mixing and introducing second yuan and ternary and improve its over-all properties at present.Nearest Japanese scholar Hiruma et al introduces strontium titanate that room temperature has paraelectric phase as second yuan on the bismuth-sodium titanate basis; Find the electric property (Y.Hiruma that is greatly improved; Y.Imai, Y.Watanabe, H.Nagata; AndT.Takenaka; " Large electrostrain near the phase transition temperature of (Bi (0.5) Na (0.5)) TiO (3)-SrTiO (3) ferroelectric ceramics, " Appl Phys Lett, 92 [26] (2008) .).And Rodel et al introduces the bismuth potassium titanate that has tetragonal under the room temperature on this basis; Thereby improved the over-all properties (K.Wang of material; A.Hussain; W.Jo; AndJ.
" Temperature-Dependent Properties of (Bi1/2Na1/2) TiO3-(Bi1/2K1/2) TiO3-SrTiO3 Lead-free Piezoceramics, " J Am Ceram Soc 1-7 (2012).Recent years, many scholars changed performance through the structure of control material, and wherein maximum is exactly the texturing of piezoelectric.The texturing degree of leadless piezoelectric material material can be passed through Lotgering ' s factor (F.K.Lotgering.Topotactical Reactions with Ferrimagnetic Oxides having Hexagonal Crystal Structures-I.Journal of Inorganic and Nuclear Chemistry; 9 (2) (1959), 113-123) characterize.Bismuth sodium titanate based textured ceramic is mainly realized textured purpose (F.Gao through the bismuth titanates template at present; C.S.Zhang, X.C.Liu, L.H.Cheng; AndC.S.Tian, " Microstructure and piezoelectric properties of textured (Na
0.84K
0.16)
0.5Bi
0.5TiO
3Lead-free ceramics, " just skew to some extent of the component of stupalith is like this limited to the raising of material property for J Eur Ceram Soc, 27 [12] 3453-58 (2007).Guaranteeing under the constant prerequisite of component, doing template with flaky strontium titanate and realize that bismuth sodium titanate based texture ceramic material then do not see relevant report.The purpose of the present invention's research adopts flaky strontium titanate to do template exactly and realizes (1-x) (Bi
0.5Na
0.5) TiO
3-xSrTiO
3The texturing of pottery, thus its piezoelectric property improved.
Summary of the invention
The object of the present invention is to provide a kind of leadless piezoelectric (1-x) (Bi
0.5Na
0.5Ti) O
3-xSrTiO
3Texture ceramic material and the textured method of this leadless piezoelectric structured stupalith.The textured method of leadless piezoelectric structured stupalith of the present invention adopts flaky strontium titanate to do template and realizes (1-x) (Bi
0.5Na
0.5) TiO
3-xSrTiO
3The texturing of pottery, simple possible can be prepared the leadless piezoelectric structured stupalith of a kind of high epitaxial.
Reach other purposes to achieve these goals, the present invention adopts following technical scheme:
The present invention at first provides a kind of leadless piezoelectric structured stupalith, and its Chemical Composition meets chemical general formula (1-x) (Bi
0.5Na
0.5) TiO
3-xSrTiO
3, 0.2≤x≤0.35 wherein.
Preferably, x=0.28 in the said chemical general formula.
The present invention also further provides a kind of leadless piezoelectric (1-x) (Bi
0.5Na
0.5Ti) O
3-xSrTiO
3The preparation method of texture ceramic material (being designated hereinafter simply as leadless piezoelectric structured stupalith) mainly may further comprise the steps:
1) preparation base-material: preparation (1-x) (Bi
0.5Na
0.5Ti) O
3-xSrTiO
3Matrix of powder material, 0.2≤x≤0.35 wherein;
2) preparation template: adopt SrTiO
3Flaky powder is a template;
3) template that obtains and base-material are prepared burden according to a certain percentage and place ball grinder, add solvent, roller mill 10-15 hour adds sticker again and continues roller and ground 3-6 hour, makes slurry;
4) take out the slurry that makes, use the curtain coating scraper on sheet glass, to carry out curtain coating; Keep flat after the curtain coating and leave standstill, diaphragm is scraped from sheet glass with blade; Diaphragm cutting back lamination is hot-forming, take out the sample thermal treatment that presses, obtain being orientated good leadless piezoelectric (1-x) (Bi
0.5Na
0.5Ti) O
3-xSrTiO
3Texture ceramic material.
1-x and x representative (Bi in the above-mentioned formula
0.5Na
0.5Ti) O
3And SrTiO
3The ratio of amount of substance.
In the step 1), said (1-x) (Bi
0.5Na
0.5Ti) O
3-xSrTiO
3Matrix of powder material adopts solid reaction process to make, and promptly adopts NaCO
3, SrCO
3, Bi
2O
3And TiO
2Be raw material, earlier according to (Bi
0.5Na
0.5Ti) O
3The stoichiometric ratio of middle Na, Bi and Ti element takes by weighing NaCO
3, Bi
2O
3And TiO
2, prepare (Bi through batching, batch mixing, precompressed and heat treatment step successively
0.5Na
0.5Ti) O
3Base-material; Again according to SrTiO
3The stoichiometric ratio of middle Na, Bi, Sr and Ti element takes by weighing SrCO
3And TiO
2, prepare SrTiO through batching, batch mixing, precompressed and heat treatment step successively
3Base-material; At last according to 1-x) (Bi
0.5Na
0.5Ti) O
3-xSrTiO
3In (Bi
0.5Na
0.5Ti) O
3And SrTiO
3Proportioning with (Bi
0.5Na
0.5Ti) O
3Base-material and SrTiO
3Base-material mixes the back oven dry and gets final product.Wherein, (Bi
0.5Na
0.5Ti) O
3Thermal treatment temp be 850 ℃, SrTiO
3Thermal treatment temp be 1100 ℃.
Step 2) in, described SrTiO
3The flaky powder template makes through two step molten-salt growth methods, and promptly the first step adopts Bi
2O
3, TiO
2With NaCl be raw material, make Bi through molten-salt growth method
4Ti
3O
12The flaky powder template; The Bi that second step obtained with the first step
4Ti
3O
12Flaky powder template, SrCO
3With NaCl be that raw material makes SrTiO through molten-salt growth method
3The flaky powder template.
Wherein, the Bi of the first step
2O
3, TiO
2Following with the proportioning of NaCl: according to Bi
4Ti
3O
12The stoichiometric ratio of flaky powder template, Bi
2O
3Quality excessive 12%, the NaCl quality is Bi
2O
3And TiO
21.1 times of total mass.The Bi in second step
4Ti
3O
12Flaky powder template, SrCO
3Following with the proportioning of NaCl: Bi
4Ti
3O
12And SrCO
3The ratio of amount of substance be 1:5, the quality of NaCl is Bi
4Ti
3O
12And SrCO
31.1 times of total mass.
In the step 3), said template and base-material are prepared burden according to a certain percentage and are meant that the gross weight in template and base-material is the basis, and said template weight accounts for the 5%-20% of template and base-material gross weight; Optimal selection is 10%.
In the step 3), said solvent is the mixing solutions of absolute ethyl alcohol and toluene; The add-on of said solvent is corresponding 4-6g absolute ethyl alcohol and the 3-5g toluene of adding of the gross weight of every 10g template and base-material.
In the step 3), the add-on of said sticker is the corresponding 2.8-3.5g of adding of the gross weight sticker of every 10g template and base-material; Optimal selection is 3.2g.
In the step 3), the roller of above-mentioned adding solvent mill adopts PM 75 to change, and the rail time consuming is 10-15 hour, and optimal selection is 12 hours.Above-mentioned adding sticker carries out the roller mill and adopts PM 55 to change, and the rail time consuming is 3-6 hour, and optimal selection is 3-4 hour.
In the step 4), the height of described curtain coating scraper and sheet glass is 50-200 μ m, and optimal selection is 100 μ m; Keep flat after the curtain coating and leave standstill 0.5-1 hour.
In the step 4), above-mentioned said lamination is hot-forming to be meant that the film after curtain coating left standstill is cut into the sheet of 1.1cm * 1.1cm, with these sheets of some amount certain height that is added to; Put into mould then; And the heating unit that can regulating and controlling temperature on die coat, then with this mould that is added with heating unit as under the single shaft tabletting machine, be heated to 40-80 ℃ after; The insulation pressurization makes folded sheet bonding together of even compact become the sheet of densification green compact.Prepare here one of bulk sample needs with along the perpendicular power of sheet direction, sheet is combined with the good face of the generation between the sheet.
In the step 4), said hot-forming temperature is 40-80 ℃, is preferably 50 ℃; Said hot-forming pressure is 10MPa-30MPa, is preferably 20MPa.
In the step 4), described thermal treatment temp is 1100-1200 ℃, is preferably 1175 ℃; Heat treated soaking time is preferably 4h for being 2-8h; Heat-treat condition can produce certain influence to orientation degree.Preferably in silicon carbide rod furnace, carry out during thermal treatment.
The present invention adopts homogeneity strontium titanate template and (1-x) (Bi
0.5Na
0.5Ti) O
3-xSrTiO
3Matrix of powder material, prepared the textured lead-free piezoceramic material of complex perovskite structure through casting technique.The present invention compared with prior art has following advantage:
1, the curtain coating technology is the technology of ripe widespread use in the ceramic industry, and preparation cost is low, technology is simple, be fit to large batch of suitability for industrialized production.
2, compare (1-x) (Bi with common prior art
0.5Na
0.5Ti) O
3-xSrTiO
3Textured lead-free piezoceramic material shows excellent orientation, and the texture degree can reach 83%, has overcome the low difficult problem of orientation degree in the ordinary skill.
3, (1-x) (Bi
0.5Na
0.5Ti) O
3-xSrTiO
3Textured lead-free piezoceramic material does not change material component, has overcome the shortcoming that adopts heterogeneous template to change material component, and Tc remains on more than 300 ℃.
4, (1-x) of the present invention (Bi
0.5Na
0.5Ti) O
3-xSrTiO
3Textured leadless piezoelectric structured stupalith, the application at aspects such as piezoelectric transducer, piezoelectric motors and high precision displacement controls lays the first stone.
1-x of the present invention) (Bi
0.5Na
0.5Ti) O
3-xSrTiO
3Textured leadless piezoelectric structured stupalith can be widely used in piezoelectric transducer, piezoelectric motors and the high precision displacement control.
Description of drawings
Adopt the SEM figure of the strontium titanate template of molten-salt growth method preparation among Fig. 1 embodiment 1.
Adopt the X ray diffracting spectrum of the strontium titanate template of molten-salt growth method preparation among Fig. 2 embodiment 1.
The template content that adopts casting method to obtain among Fig. 3 embodiment 2 is 5% 0.72 (Bi
0.5Na
0.5) TiO
3-0.28SrTiO
3The X ray diffracting spectrum of textured leadless piezoelectric structured stupalith.
The template content that adopts casting method to obtain among Fig. 4 embodiment 3 is 10% 0.72 (Bi
0.5Na
0.5) TiO
3-0.28SrTiO
3The X ray diffracting spectrum of textured leadless piezoelectric structured stupalith.
The template content that adopts casting method to obtain among Fig. 5 embodiment 4 is 20% 0.72 (Bi
0.5Na
0.5) TiO
3-0.28SrTiO
3The X ray diffracting spectrum of textured leadless piezoelectric structured stupalith.
Embodiment
Below through specific specific examples embodiment of the present invention is described, those skilled in the art can understand other advantages of the present invention and effect easily by the content that this specification sheets disclosed.The present invention can also implement or use through other different embodiment, and each item details in this specification sheets also can be based on different viewpoints and application, carries out various modifications or change under the spirit of the present invention not deviating from.
Embodiment 1:
Preparation strontium titanate template.
Take by weighing 11.356g Bi
2O
3Powder, 2.607g TiO
2Powder; Take by weighing 15.358g NaCl powder again; With all powders and absolute ethyl alcohol ball mill mixing ball milling 24 hours, with mixed material oven dry, the alumina crucible of packing into was put into 1000 ℃ of insulations of stove 2 hours; Put into B after the cooling and clean NaCl with deionized water, oven dry obtains the bismuth titanates template.
Take by weighing the bismuth titanates template and the 6.301gSrCO of the preparation of 10g the first step molten-salt growth method
3Powder; Take by weighing 17.932g NaCl powder again; With all powders and absolute ethyl alcohol ball mill mixing ball milling 24 hours, with mixed material oven dry, the alumina crucible of packing into was put into 970 ℃ of insulations of stove 2 hours; Put into B after the cooling and clean NaCl with deionized water, oven dry obtains the strontium titanate template.
Fig. 1 is the X ray diffracting spectrum of the strontium titanate template of preparation.On scheming, can find out to have only the uhligite phase structure, not observe other dephasigns.
Fig. 2 is the SEM figure of the strontium titanate template of preparation.On scheming, can find out that obviously template is a sheet structure, and about 10 microns of mean sizes, can satisfy the desired template size size of casting method.
Embodiment 2:
0.72 (Bi
0.5Na
0.5) TiO
3-0.28SrTiO
3The preparation of base-material: adopt NaCO
3, SrCO
3, Bi
2O
3And TiO
2Be raw material, according to (Bi
0.5Na
0.5Ti) O
3And SrTiO
3The stoichiometric ratio of Na, Bi, Sr and Ti element takes by weighing NaCO in the base-material
3, SrCO
3, Bi
2O
3And TiO
2, prepare through batching, batch mixing, precompressed and heat treatment step successively.(Bi
0.5Na
0.5Ti) O
3Thermal treatment temp be 850 ℃, soaking time is 4h; SrTiO
3Thermal treatment temp be 1100 ℃, soaking time is 4h.
Take by weighing the bismuth-sodium titanate base-material of the above-mentioned preparation of 7.480g and the strontium titanate base-material of the above-mentioned preparation of 2.020g, with the base-material that is taken by weighing and absolute ethyl alcohol ball mill mixing ball milling 24 hours, with mixed material oven dry.Take by weighing the strontium titanate template of preparation among the 0.5g embodiment 1 and the base-material of above-mentioned ball milling then, add 4.8g toluene and 5g absolute ethyl alcohol roller mill after 12 hours, add the 3.2g sticker and continued the roller mill 4 hours, make slurry; The slurry that taking-up makes uses the curtain coating scraper on sheet glass, to carry out curtain coating, and the scraper height is 100 μ m; Keep flat after the curtain coating leave standstill 1 hour after, diaphragm is scraped from sheet glass; Diaphragm is cut into behind the square sheet of 11mm*11mm lamination 50 ℃ hot-forming, hot pressing pressure is 20Mpa; Base substrate after the moulding is sticking 550 ℃ of rows, in silicon carbide rod furnace, to heat-treat then, thermal treatment temp is 1175 ℃ of insulations 4 hours, temperature rise rate is 3 ℃/minute, prepares 0.72 good (Bi of orientation degree
0.5Na
0.5) TiO
3-0.28SrTiO
3Textured leadless piezoelectric structured stupalith.
Fig. 3 is 0.72 (Bi
0.5Na
0.5) TiO
3-0.28SrTiO
3The X ray diffracting spectrum of textured leadless piezoelectric structured stupalith can find out to have only the uhligite phase structure on scheming, do not observe other dephasigns.Through X ray diffracting spectrum, Lotgering ' the s factor F=53% that calculates.
Embodiment 3:
Take by weighing the bismuth-sodium titanate base-material of 7.480g embodiment 2 preparation and the strontium titanate base-material of 1.520g embodiment 2 preparations,, mixed material is dried the base-material that is taken by weighing and absolute ethyl alcohol ball mill mixing ball milling 24 hours.Take by weighing the strontium titanate template of preparation among the 1g embodiment 1 and the base-material of above-mentioned ball milling then, add 4.8g toluene and 5g absolute ethyl alcohol roller mill after 12 hours, add the 3.2g sticker and continued the roller mill 3 hours, make slurry; The slurry that taking-up makes uses the curtain coating scraper on sheet glass, to carry out curtain coating, and the scraper height is 100 μ m; Keep flat after the curtain coating leave standstill 1 hour after, diaphragm is scraped from sheet glass; Diaphragm is cut into behind the square sheet of 11mm*11mm lamination 50 ℃ hot-forming, hot pressing pressure is 20MPa; Base substrate after the moulding is sticking 550 ℃ of rows, in silicon carbide rod furnace, to heat-treat then, thermal treatment temp is 1175 ℃ of insulations 4 hours, temperature rise rate is 3 ℃/minute, prepares 0.72 good (Bi of orientation degree
0.5Na
0.5) TiO
3-0.28SrTiO
3Textured leadless piezoelectric structured stupalith.
Fig. 4 is 0.72 (Bi
0.5Na
0.5) TiO
3-0.28SrTiO
3The X ray diffracting spectrum of textured leadless piezoelectric structured stupalith can find out to have only the uhligite phase structure on scheming, do not observe other dephasigns.Through X ray diffracting spectrum, Lotgering ' the s factor F=83% that calculates has obtained 0.72 good (Bi of orientation degree
0.5Na
0.5) TiO
3-0.28SrTiO
3Leadless piezoelectric structured stupalith.
Embodiment 4:
Take by weighing among the 7.480g embodiment 2 the bismuth-sodium titanate base-material of preparation and the strontium titanate base-material of 0.520g embodiment 2 preparations,, mixed material is dried the base-material that is taken by weighing and absolute ethyl alcohol ball mill mixing ball milling 24 hours.Take by weighing the strontium titanate template of preparation among the 2g embodiment 1 and the base-material of above-mentioned ball milling then, add 4.8g toluene and 5g absolute ethyl alcohol roller mill after 12 hours, add the 3.2g sticker and continued the roller mill 3 hours, make slurry; The slurry that taking-up makes uses the curtain coating scraper on sheet glass, to carry out curtain coating, and the scraper height is 100 μ m; Keep flat after the curtain coating leave standstill 1 hour after, diaphragm is scraped from sheet glass; Diaphragm is cut into behind the square sheet of 11mm*11mm lamination 50 ℃ hot-forming, hot pressing pressure is 20Mpa; Base substrate after the moulding is sticking 550 ℃ of rows, in silicon carbide rod furnace, to heat-treat then, thermal treatment temp is 1175 ℃ of insulations 4 hours, temperature rise rate is 3 ℃/minute, prepares 0.72 good (Bi of orientation degree
0.5Na
0.5) TiO
3-0.28SrTiO
3Textured leadless piezoelectric structured stupalith.
Fig. 5 is 0.72 (Bi
0.5Na
0.5) TiO
3-0.28SrTiO
3The X ray diffracting spectrum of textured leadless piezoelectric structured stupalith can find out to have only the uhligite phase structure on scheming, do not observe other dephasigns.Through X ray diffracting spectrum, Lotgering ' the s factor F=64% that calculates.
The above; Being merely preferred embodiment of the present invention, is not to any formal and substantial restriction of the present invention, should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the inventive method, also can make some improvement and replenish, these improvement and replenish and also should be regarded as protection scope of the present invention.Allly be familiar with the professional and technical personnel, under the situation that does not break away from the spirit and scope of the present invention, the technology contents that is disclosed more than capable of using and a little change of making, modify the equivalent variations with differentiation, be equivalent embodiment of the present invention; Simultaneously, the change of any equivalent variations that all foundations essence technology of the present invention is done the foregoing description, modify and differentiation, all still belong in the scope of technical scheme of the present invention.
Claims (10)
1. leadless piezoelectric structured stupalith, its Chemical Composition meets chemical general formula (1-x) (Bi
0.5Na
0.5) TiO
3-xSrTiO
3, 0.2≤x≤0.35 wherein.
2. the preparation method of leadless piezoelectric structured stupalith as claimed in claim 1 comprises the following steps:
1) preparation base-material: preparation (1-x) (Bi
0.5Na
0.5) TiO
3-xSrTiO
3Matrix of powder material, 0.2≤x≤0.35 wherein;
2) preparation template: preparation SrTiO
3The flaky powder template;
3) template that obtains and base-material are prepared burden according to a certain percentage and place ball grinder, add solvent, roller mill 10-15 hour adds sticker again and continues roller and ground 3-6 hour, makes slurry;
4) take out the slurry that makes, use the curtain coating scraper on sheet glass, to carry out curtain coating; Keep flat after the curtain coating and leave standstill, diaphragm is scraped from sheet glass with blade; Diaphragm cutting back lamination is hot-forming, take out the sample thermal treatment that presses, obtain being orientated good (1-x) (Bi
0.5Na
0.5) TiO
3-xSrTiO
3Leadless piezoelectric structured stupalith is said leadless piezoelectric structured stupalith.
3. the preparation method of leadless piezoelectric structured stupalith as claimed in claim 1 is characterized in that step 2) in, said SrTiO
3The flaky powder template makes through two step molten-salt growth methods: the first step, adopt Bi
2O
3, TiO
2With NaCl be raw material, make Bi through molten-salt growth method
4Ti
3O
12The flaky powder template; The Bi that second step obtained with the first step
4Ti
3O
12Flaky powder template, SrCO
3With NaCl be that raw material makes SrTiO through molten-salt growth method
3The flaky powder template.
4. the preparation method of leadless piezoelectric structured stupalith as claimed in claim 1 is characterized in that, in the step 3), said template weight accounts for the 5%-20% of template and base-material gross weight.
5. the preparation method of leadless piezoelectric structured stupalith as claimed in claim 1 is characterized in that,
In the step 3), said solvent is the mixing solutions of absolute ethyl alcohol and toluene; The add-on of said solvent is corresponding 4-6g absolute ethyl alcohol and the 3-5g toluene of adding of the gross weight of every 10g template and base-material;
In the step 3), the add-on of said sticker is the corresponding 2.8-3.5g of adding of the gross weight sticker of every 10g template and base-material.
6. the preparation method of leadless piezoelectric structured stupalith as claimed in claim 1 is characterized in that, in the step 3), adds solvent and carries out 75 commentaries on classics of roller mill employing PM; Add sticker and carry out 55 commentaries on classics of roller mill employing PM.
7. the preparation method of leadless piezoelectric structured stupalith as claimed in claim 1 is characterized in that, in the step 4), the height of described curtain coating scraper and sheet glass is 50-200 μ m; Keep flat after the curtain coating and leave standstill 0.5-1 hour.
8. the preparation method of leadless piezoelectric structured stupalith as claimed in claim 1 is characterized in that, in the step 4), said hot-forming temperature is 40-80 ℃; Hot-forming pressure is 10MPa-30MPa.
9. the preparation method of leadless piezoelectric structured stupalith as claimed in claim 1 is characterized in that, in the step 4), described thermal treatment temp is 1100-1200 ℃; Heat treated soaking time is for being 2-8h; Thermal treatment is carried out in silicon carbide rod furnace.
10. the application of leadless piezoelectric structured stupalith as claimed in claim 1 in piezoelectric transducer, piezoelectric motors and high precision displacement control.
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| CN104098328A (en) * | 2014-06-30 | 2014-10-15 | 同济大学 | Low-electric-field large-strain-response lead-free piezoelectric texture ceramic material as well as preparation method and application thereof |
| CN104628379A (en) * | 2013-11-06 | 2015-05-20 | 同济大学 | Highly-oriented lead-free piezoelectric textured ceramic material and preparation method and application thereof |
| CN107098699A (en) * | 2017-03-28 | 2017-08-29 | 同济大学 | The leadless piezoelectric structured ceramics and preparation method of width sintering warm area and wide composition regulation |
| CN107311649A (en) * | 2017-07-26 | 2017-11-03 | 中南大学 | A kind of bismuth-sodium titanate strontium titanates sub-micrometer rod and its preparation method and application |
| CN111620690A (en) * | 2020-06-09 | 2020-09-04 | 哈尔滨工业大学 | Sodium bismuth titanate-based ceramic with large strain and small hysteresis obtained by utilizing constructed ion pairs and preparation method thereof |
| CN114315346A (en) * | 2021-12-10 | 2022-04-12 | 广东华中科技大学工业技术研究院 | Preparation method of large-strain lead-free piezoelectric textured ceramic with double-template texture |
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| CN103936413A (en) * | 2013-01-22 | 2014-07-23 | 同济大学 | Mn-doped sodium bismuth titanate-potassium bismuth titanate-strontium titanate ternary series piezoelectric film material and preparation method thereof |
| CN103936413B (en) * | 2013-01-22 | 2015-11-25 | 同济大学 | Bismuth sodium titanate-bismuth potassium titanate-strontium titanate ternary system piezoelectric thin-film material mixing Mn and preparation method thereof |
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| CN107311649A (en) * | 2017-07-26 | 2017-11-03 | 中南大学 | A kind of bismuth-sodium titanate strontium titanates sub-micrometer rod and its preparation method and application |
| CN107311649B (en) * | 2017-07-26 | 2020-12-11 | 中南大学 | Sodium bismuth titanate-strontium titanate submicron rod and preparation method and application thereof |
| CN111620690A (en) * | 2020-06-09 | 2020-09-04 | 哈尔滨工业大学 | Sodium bismuth titanate-based ceramic with large strain and small hysteresis obtained by utilizing constructed ion pairs and preparation method thereof |
| CN114315346A (en) * | 2021-12-10 | 2022-04-12 | 广东华中科技大学工业技术研究院 | Preparation method of large-strain lead-free piezoelectric textured ceramic with double-template texture |
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